I find the smaller-coned M-Audios to be completely lacking in bass, although I haven't tried the Studio Pro series, only the BX series. The 8" ones were the only ones with a decent full-range response, although the stereo imaging wasn't too good and they sounded kinda tinny and metallic. For the money, I haven't seen a better deal than Event TR6Ns. They retail at $400 for a pair, but you can probably get a better deal than that (I got mine as demo models at Guitar Center for $278 total). Not much deeeeeeeep bass, but enough that you can tell how it's going to sound on other systems once you get used to how they sound. And it doesn't take much getting used to. Pretty flat frequency response, nice airy highs, excellent transient response which makes for an amazing clear and wide stereo image. If you can't afford to spend the money on Mackies or better, Events are the way to go, in my opinion. They're the best pro audio purchase I've made, although the Presonus Firepod has also been treating me well.